fibrin

noun

fi·​brin ˈfī-brən 

: a white insoluble fibrous protein formed from fibrinogen by the action of thrombin especially in the clotting of blood

fibrinous

ˈfī-brə-nəs 

adjective

Examples of fibrin in a Sentence

Recent Examples on the Web

After fibrin formation has occurred, a clot (thrombus) develops.3 This complex process can take seconds to two hours.1 2. —Michael Menna, Verywell Health, 17 Jan. 2025

In more severe cases, injections such as corticosteroids, platelet-rich plasma (PRP) or fibrin may be necessary. —Sandra Rose Salathe, Flow Space, 29 Jan. 2025

The body accomplishes this by tightening the blood vessels (vasoconstriction), moving platelets to the injury site (platelet aggregation), and forming fibrin—a protein that helps blood clot. —Michael Menna, Verywell Health, 17 Jan. 2025

These drugs slow down clotting by reducing fibrin formation and preventing clots from forming and growing. —Anna Giorgi, Verywell Health, 1 Dec. 2024

The types of products that FDA regulates in this category… [do not include] blood taken from an individual and given back to the same individual as platelet rich fibrin... —Kara Nesvig, Allure, 15 Aug. 2024

This is filled with fibers made of natural proteins like collagen and fibrin, which are part of the extracellular matrix that gives animal cells their structure. —Breanna Draxler, Discover Magazine, 2 Apr. 2013

Blood clots form when fibrin, strands of protein that form a net in the blood vessels, begin to gather, causing platelets and cells to clump and get caught in the net. —Sara Novak, Discover Magazine, 23 Mar. 2023

An epidermal sheet grown on a fibrin base, like the grafts used to heal a boy's skin in Germany. —Nathaniel Scharping, Discover Magazine, 8 Nov. 2017

Word History

First Known Use

1800, in the meaning defined above

Kids Definition

fibrin

noun

fi·​brin ˈfī-brən 

: a white fibrous substance that is difficult to dissolve and is formed in the clotting of the blood

Medical Definition

fibrin

noun

fi·​brin ˈfī-brən 

: a white insoluble fibrous protein formed from fibrinogen by the action of thrombin especially in the clotting of blood